GEOLOGIC MAP MOSAIC OF THE LONG BEACH, LOS ANGELES, OCEANSIDE, SAN BERNARDINO, SAN DIEGO, AND SANTA ANA 30'X60' QUADRANGLES, SOUTHERN CALIFORNIA - RESULTS OF THE SOUTHERN CALIFORNIA AREAL MAPPING PROJECT - SCAMP - A COOPERATIVE STATEMAP FEDMAP PROJECT

The Southern California Areal Mapping Project – SCAMP – has completed the compilation of six 30’x60’ quadrangles that produce a continuous geologic map extending along the coast from Malibu to San Diego and inland to the Riverside-San Bernardino area and the southern Mojave Desert. This area includes a population of over 14.5 million. Maps will soon be completed that extends the coastal mapping west to Goleta and inland mapping to east of Palm Springs. The current map, covering the urban areas of southern California, is a product of close cooperative efforts of the California Geological Survey (CGS) and the U.S. Geological Survey (USGS). Support for the CGS comes from state’s Regional Geological and Hazards Mapping Program and the STATEMAP component of the National Cooperative Geologic Mapping Program (NCGMP); support for the USGS comes from the FEDMAP component of the NCGMP and a large number of other agencies including U.S. Air Force, U.S. Forest Service, Army Corps of Engineers, and local agencies such as the San Bernardino Municipal Water Agency and Eastern Municipal Water District. The maps include a large amount of new geologic mapping in addition to the compilation of existing mapping. Most line work was digitized at a scale of 1:24,000 but some in the more remote areas of the Santa Ana and San Gabriel Mountains derives from 1:62,500 or reconnaissance mapping; much of Orange County line work was entered at 1:12,000. Major geologic features include the central Transverse Ranges, Los Angeles Basin, Palos Verdes Peninsula, northern Peninsular Ranges batholith, and the San Diego Eocene embayment. The mapped area includes a number of active major faults, the San Andreas, San Gabriel, San Jacinto, Elsinore, Whittier, Newport-Inglewood, Palos Verdes, Rose Canyon, San Clemente, and Cucamonga-Malibu. All the digital 30’x60’ maps are published or soon will be. Supplementing the 30’x60’ quadrangles are over 65 digital 7.5’ quadrangles. Most of these maps can be viewed and downloaded from the USGS web site (http://geopubs.wr.usgs.gov) and the CGS web site (http://www.conservation.ca.gov/CGS/rghm/rgm/preliminary_geologic_maps.htm).